package com.yang.mall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.extension.conditions.update.UpdateChainWrapper;
import com.fasterxml.jackson.databind.util.BeanUtil;
import com.mysql.cj.util.StringUtils;
import com.yang.common.constant.ProductConstant;
import com.yang.mall.product.dao.AttrAttrgroupRelationDao;
import com.yang.mall.product.dao.AttrGroupDao;
import com.yang.mall.product.dao.CategoryDao;
import com.yang.mall.product.entity.AttrAttrgroupRelationEntity;
import com.yang.mall.product.entity.AttrGroupEntity;
import com.yang.mall.product.entity.CategoryEntity;
import com.yang.mall.product.service.AttrGroupService;
import com.yang.mall.product.service.CategoryService;
import com.yang.mall.product.vo.AttrGroupRelationVo;
import com.yang.mall.product.vo.AttrRespVo;
import com.yang.mall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yang.common.utils.PageUtils;
import com.yang.common.utils.Query;

import com.yang.mall.product.dao.AttrDao;
import com.yang.mall.product.entity.AttrEntity;
import com.yang.mall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.w3c.dom.Attr;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {
    @Resource
    AttrAttrgroupRelationDao relationDao;
    @Resource
    AttrGroupDao attrGroupDao;
    @Resource
    CategoryDao categoryDao;
    @Autowired
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String attrType) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type", "base".equalsIgnoreCase(attrType)
                ? ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode() : ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());
        if (catelogId != 0) {
            //查指定的catelogId
            queryWrapper.eq("catelog_id", catelogId);
        }
        //检索条件
        String key = (String) params.get("key");
        if (!StringUtils.isNullOrEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key)
                        .or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );
        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);
            //1.设置分类和分组的名字
            if ("base".equalsIgnoreCase(attrType)) {
                AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                //得到组id
                if (attrId != null && attrId.getAttrGroupId()!=null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(respVos);
        return pageUtils;
    }

    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        //保存基本数据
        this.save(attrEntity);
        //基本属性才需要保存分组关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode() && attr.getAttrGroupId()!=null) {
            //保存关联关系
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }


    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);
        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode()) {
            //1.设置分组信息
            AttrAttrgroupRelationEntity attrGroupRelationEntity = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attrId));
            if (attrGroupRelationEntity != null) {
                attrRespVo.setAttrGroupId(attrGroupRelationEntity.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrGroupRelationEntity.getAttrGroupId());
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }

            }
        }

        //2.设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] categoryPath = categoryService.findCategoryPath(catelogId);
        attrRespVo.setCatelogPath(categoryPath);

        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        return attrRespVo;
    }

    //开启事务
    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);
        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode()) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());
            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>()
                    .eq("attr_id", attr.getAttrId()));
            if (count > 0) {
                //修改分组关联
                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>()
                        .eq("attr_id", attr.getAttrId()));
            } else {
                relationDao.insert(relationEntity);

            }
        }

    }

    /**
     * 根据分组id查找关联的所有基本属性
     *
     * @param attrGroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrGroupId) {
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>()
                        .eq("attr_group_id", attrGroupId));
        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());
        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }
        List<AttrEntity> attrEntities = this.listByIds(attrIds);
        return attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        //relationDao.delete(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",1L))
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     *
     * @param params
     * @param attrGroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrGroupId) {
        //1.当前分组只能关联自己所属分类里的属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrGroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2.当前分组只能关联别的分组没有引用的属性
        //2.1当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>()
                .eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());
        //2.2这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>()
                .in("attr_group_id", collect));
        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());
        //2.3从当前分类中的所有属性中移除这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId)
                .eq("attr_type", ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode());
        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isNullOrEmpty(key)) {
            wrapper.and((w) -> {
                w.eq("attr_id", key)
                        .or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);
        return new PageUtils(page);
    }

}